Area Forecast Discussion
Issued by NWS Burlington, VT

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FXUS61 KBTV 240723

Area Forecast Discussion
National Weather Service Burlington VT
323 AM EDT Wed Apr 24 2024

A strong cold front is sagging south with light to moderate rain
showers over the region. Temperatures will drop throughout the
day, and a brief period of snow is possible as precipitation
tapers off. Only minor accumulations of snow are expected given
a period of warm temperatures ahead of the falling snow. After
one cool day on Thursday, conditions will begin to warm and
become above normal for the new work week. Another interval of
sharp drying takes place Thursday and Friday. Rain chances will
return later Saturday into early next week.


As of 321 AM EDT Wednesday...We`re awaiting our anticipated strong
cold front early this morning. There continue to be showers
streaming out ahead of it that are producing spotty precipitation,
mainly from there being so much dry air present. However, we`re
starting to see pockets of higher reflectivities in St. Lawrence
County as lapse rates are somewhat steep. Some high res guidance
event even indicates the potential for a broken line by morning
as the boundary shifts into Vermont and 100- 200 J/kg of CAPE
develops this afternoon. Overall, guidance is less bullish on
cold air and pulled back on snowfall. There could still be a
dusting around 1000 ft or higher, and maybe an inch for summits.
It will still be a sharp boundary with 5 to 10 degree drops in
temperature over a 2 to 3 hour time frame with a fast switch
from southwest to northwest winds.

The air mass coming in is very dry. Once the front is south, clouds
will quickly clear out tonight. Cool northwest flow will bring
temperatures into the teens across the Adirondacks and parts of the
Northeast Kingdom, with low to mid 20s across the region. The only
area that may hold onto 30s will be near Lake Champlain. Conditions
on Thursday will be fairly cool with 40s, which is about 10 degrees
below normal for this time of the year. Fortunately, it will not be
too breezy, with mainly 10 to 15 mph northwest wind gusts. So it
won`t feel too raw. It will be very dry, though. Single digit to
lower teen dewpoints will shift into the area. So more 20 to 30
percent relative humidity values in the afternoon are on the table,
but today`s rain and lack of winds will preclude fire weather


As of 321 AM EDT Wednesday...Dry conditions will continue into
Thursday evening as the region remains under the influence of high
pressure. Clear skies and light winds are expected, which will allow
for strong radiational cooling, making for a cold night. Overnight
low temperatures will drop into the 20s to near freezing once again.

Another sunny and dry day will round out the work week as the region
remains under high pressure. After a cold start to the day, daytime
highs will climb into the 50s and low 60s, which will feel pleasant
with the ample sunshine expected throughout the day. Winds will
remain light throughout the day, which will help limit fire weather
concerns. Another favorable raditional cooling night is expected for
much of the night, before increasing clouds begin to move in.
Overnight lows will be cold but not as cold as the night prior, with
temperatures in the mid 20s to 30s. The coldest spots will be across
the Northeast Kingdom as clear skies will continue for most of the
overnight hours.


As of 321 AM EDT Wednesday...Precipitation chances will increase as
we head into the weekend into early next week as several shortwaves
rotate into the region, as the upper level ridge shifts eastward and
begins to flatten out. Much of Saturday looks to remain dry, with
increasing chances of showers heading through the evening, although
guidance is still fairly spread with the exact timing of these
features and how quickly the ridge breaks down. The other thing to
consider is the amount of dry air across the region these features
will have to overcome for measurable precipitation. Given the
uncertainty at this point, continued to stick with the NBM, with
some showers expected Sunday into early next week. Temperatures will
continue to warm up through the weekend, with highs in the 60s and
low 70s by early next week. The warm temperatures and diurnal
heating will allow for some instability to develop in the afternoons
early next week, with the potential for some rumbles of thunder.


Through 06Z Thursday...Conditions are mostly VFR at this time,
with 2300 ft agl ceilings at KSLK alone at this time. Showers
are streaming ahead of a frontal boundary just northwest of
Ottawa, and we should see coverage expand over the next few
hours. Ahead of it, fast south to southwest flow aloft remains,
and noted LLWS at KMPV and KRUT through 11z, but intervals of
it may be possible at KPBG and KEFK as well. Anticipate most of
the prevailing reductions to ceilings and visibility to be
closely tied to the frontal boundary and its associated wind
shift. Most areas should remain MVFR, but KSLK, KBTV, and KEFK
may see brief IFR ceilings in the northwest flow. It will reach
KMSS about 10z, KPBG and KBTV about 14-15z, and KRUT, KMPV, and
KEFK about 16-17z. The wind shift will be a sharp transition
from southwest to northwest winds. At KSLK and KEFK, conditions
are most likely to become cold enough for brief snow about 14z
to 16z and 16z to 19z respectively. Behind the front, conditions
rapidly improve, and most locations should trend to clear skies
about 00z. Northwest winds behind the front will be 8 to 14
knots sustained and gusting 18 to 25 knots, and slowly subside
after 00z.


Thursday: VFR. NO SIG WX.
Thursday Night: VFR. NO SIG WX.
Friday: VFR. NO SIG WX.
Friday Night: VFR. NO SIG WX.
Saturday: VFR. Slight chance SHRA.
Saturday Night: Mainly VFR, with areas MVFR possible. Likely
Sunday: Mainly MVFR, with local VFR possible. Chance SHRA.




NEAR TERM...Haynes
LONG TERM...Kremer
AVIATION...Haynes is the U.S. government's official web portal to all federal, state and local government web resources and services.